SMC Networks SMC91C95 - Manual (Page 43)

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detection for magic packet - enabled by
nWAKEUPEN pin (92 QFP) or WAKEUP_EN in
CTR.
NOTE: If the MP mode is activated using the
nWAKEUPEN pin, the pin must be deasserted to
exit the mode.
TX_DEFR - Transmit Deferred. When set, carrier
was detected during the first 6.4
µ
sec of the inter
frame gap. Cleared at the end of every packet
sent.
LTX_BRD - Last transmit frame was a broadcast.
Set if frame was broadcast. Cleared at the start of
every transmit frame.
SQET - Signal Quality Error Test. The transmitter
opens a 1.6
µ
sec window 0.8
µ
sec after
transmission is completed and the receiver returns
inactive. During this window, the transmitter
expects to see the SQET signal from the
transceiver. The absence of this signal is a 'Signal
Quality Error' and is reported in this status bit.
Transmission stops and EPH INT is set if
STP_SQET is in the TCR is also set when SQET
is set. This bit is cleared by setting TXENA high.
16COL- 16 collisions reached. Set when 16
collisions are detected for a transmit frame.
TXENA bit in TCR is reset. Cleared when TXENA
is set high.
LTX_MULT - Last transmit frame was a multicast.
Set if frame was a multicast. Cleared at the start
of every transmit frame.
MULCOL - Multiple collision detected for the last
transmit frame. Set when more than one collision
was experienced. Cleared when TX_SUC is high
at the end of the packet being sent.
SNGLCOL - Single collision detected for the last
transmit frame. Set when a collision is detected.
Cleared when TX_SUC is high at the end of the
packet being sent.
TX_SUC - Last transmit was successful. Set if
transmit completes without a fatal error. This bit is
cleared by the start of a new frame transmission or
when TXENA is set high.
Fatal errors are:
16 collisions
SQET fail and STP_SQET = 1
FIFO Underrun
Carrier lost and MON_CSN = 1
Late collision